Ore-roasting pot.



15'. D. BAKER.

ORE ROASTING POT.

uruoumn FILED NOV.14,1908

942,810, Patented Dec. 7, 1909;

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WMWS 47% 6 .42 IM, 5M

F. D. BAKER.

ORE ROASTING POT.

urmoumnrmsn NOV. 14, 1908.

Patented Dec. 7, 1909.

4 SHEETS-BKEBTB.

F. D. BAKER.

ORE EOASTING POT.

APPLIOATION FILED HOV. 14,1908.

@@%,8 1 GD Patented Bea 7, 1909.

& SHEETS-SHEET 3 wikme/meo F. D. BAKER.

ORE BOASTING PUT;

APPLIUATION rum; 210v, 14, 1909.

Patented Dec; 7, 1909.

; SHEETS-FREE! 4.

UNITED sTATEs PATENT orric FRANK n. BAKER, or nnnvnn, COLORADO.

onn-nons'rme roar.

Specification of Letters Patent.

Patented Dec. 7, 1909,

Application filed November 14, 1908. Serial No. 462,702.

same,'referen ce being had to the accompanying drawings, and to the figures of reference xiiarked thereon, which. form a part of this specification. i

My-inventionrelates to improvements in ore roasting .apparatus in which roastingpots are employed.

My improved features relate more particularly to the hood or cover for the ot. In my improved construction, the ho is devoid of connecting flue's and provision is made for a seal around its lower'edge whereby the entrance of airis prevented. The number of openings in my improved hood for rabbling purposes, is also reduced to a minimum, and provision is made for tightly closing them by means of doors 'movably- 'moun'ted, whereby they. may be readily trated an embodiment'thereof.

swung to the open position, a special .construction; being employed to facilitate the opening and closing operation. By Dreventin the entrance of air from the outside, the voume of air to be handled by the flue and the stack is reduced, thus making it practicable to form these elements of less capacity than would otherwise be required. By providing the hood with air-tight doors and by sealing its lower edge the gases, after escaping from the pot may be delivered by pressure from the blower supplylng air 1nto the converter-pot,"th'rough the fines 1nto the atmosphere without the aid of a stack or obter means of supplyingdraft.

Having briefly outlined my improved construction, I will proceed to describe the same in detail, reference being made to the accompanying drawing in which is illus- In this draivvin Figure 1 is a sectional view of the hoo and the apparatus employed in connection therewlth, the pot, however, and its dirct connections, being shown inelevation. Fig. 2 is a sectional view of the pot and hood shown on a larger scale, parts of the surroundin construction for lack or room on the sheet-.1 Fig.3 is a fragmentary view or the hood showing my improved door construe-f tion one larger scale. Fig. 4 is aside ele vatlon illustrating the track adapted to engage a roller-mounted upon one extremity ojthe rod which carries the door. Fig. 5'

is'a section taken on the line 55 Fig. '3 viewed in the direction of the arrow. 6 and 7 "are sections'taken on thelines 6 -6 and 77 respectively, viewed in the direct1on of the arrows.' Fig. 8 shows the. pot in elevation and the hood partly broken away and partly in elevation. In this view a modified form of seal is illustrated. The

gage a surrounding track making it practicable to rotate the hood, whereby the hood need be provided with a single rabble opening only. 7 Y

The same reference'characters indicate the same parts in all the views.

Let the numeral 5 desi ate a wall inclosing a chamber 6, in which the pot 7 sits, being'supported upon seats 8 and a twyer 9 through which the necessary blast of air is introduced for properly roasting the ore. For this purpose an air conduit 10 has one extremity in communication with the twyer, while the other extremity leads to a large air-supply pipe 12. The conduit 10 is provided with a gate valve 13 forcon'trolling' the passage of air through the conduit.

The pot is interiorly provided with a perforated false bottom or hearth 14, which is held in place by a bolt 15, the outer edge of the hearth engaging the inner wall of the pot below an interlorly projecting retaining ring 16. This hearth is formed in sectorshaped sections, but as nothing is claimed thereon in this application, this feature need not be further explained in detail.

The hood 1'? is provided at the top with a bail 18 to facilitate handling the same. Its body portion isfrusto-conical in shape. 'To the lower edge of this cone-shaped part is secureda depending cylindrical -member 19 whose lower edge is sealed to prevent the entrance of air. The sealing means employed may be varied. In the form of construction-shown in Figs. 1 and'2, sand or other ranular material 20, is illustrated;

while in the construction shown in Fig. 8,

the'upper portion 21 of the wall surrounding the chamber'6 is provided with a'cir cumferential recess 22 containing a llqu d' seal 23 'into which the'lower edge of the poses. Each rab le opening, whether one 'or more is employed, is closed by a door 26 provided with a ert-ured lugs 27 through WhlCll passesaro 28.1 The upper extremlty of this rod is mounted toiswing loosely upona spindle 29, engaging'a bearing 30 secured to the hood by a astening devlce 31. The

. ties o the track are provided. The upper rod is provided near its lower extremity with a collar 32 madefast to the rod as shown at 33. Pro ectm in opposite directions from this collar an formed integral therewith, are arms 34 provided with upwardly projecting la 35, which overlap the lower extremity o the door and form stops'to prevent the latter from swinging too far in either direction upon the rod 28.

- The opening 36 in the hood is surrounded .by a' frame 37, the frame having an upwardly projecting .flange 38 u' on which tdoor.26 rests when, in the -c osed position. The lower extremity ofthe rod 28' is prohood by suitable fastening devices 42 passed throu flanges 43 with which the extremiextremity of the track is provided with a re- 'cess 44 adapted to receive. the roller 39, when the door is in the open position, This recess hoo is lowered to the closing position.

retains the door in the open position and prevents its accidental return to the closed position.' The frame 37 is provided on one side with stops 45 which prevent the door from moving beyond its proper position for closing the opening 36.

The. lower part of the hood is provided on the inside with bars 46 which form guides ada ted to engage the top of the pot as the By reference to the drawing it will be understood that while the chamber in which false bottom 14 of the pot the pot is mounted is made air-tight except for 1ts communication with the stack, the

47 between the top of t e pot and the adjacent portion of the hood, into the said chamber, and pass out through flues 48, 49 and 50 to the stack 51. The flue member 50 is provided with a gate valve 52. When the 'apparatus is. in use, the pot is filled with ore which rests upon the perforated hearth or In commencin the roasting operation, provision is .ma e by the employment of suitable fuel or a qua iatitg of ore'sufficiently heated for the purpose, for igniting the com- 'bustible elements as sulfur contained in the ore, and which it is necessary to remove be? .been effected the doors are closed and the For this purpose it is provided on each side I claim is:

fore the orecan roperly treated for the savlng or removal 0 its metallic contents.

Assuming that the pot is filled with ore,

and provision for ignitin the same is made,

and also assuming that t e hood is in place and sealedto revent the entrance ofair or the escape of umes, a blast of air for combustion purposes is delivered to the pot below the hearth thereof, through the twyer 9 and the conduit 10 as heretofore explained. This blast of air may be sufiicient to provide the necessary draft for roasting purposes without 'theaid of a tall chimney or stack.

Whenever it becomes necessary to rabble or stir the 'ore, the gate valves 13 and 52 may be closed and onefior more doors 26. opened to permit access to the'ore within the pot through an openin or openings 36 in the hood. After the ra blin-g operation has gate valves 13-and 52. opened and the process of roasting goes on. After the ore is properly roasted isremovedby hfting the'same front-the pot in any suitab manner. The. pot is then removed and ped.

with a recess 53"into which hooks (not shown) ma be inserted for lifting purposes. vided with a roller 39 whicheng'ages a rail ii 40 formed one. track-bar 41 secured to the Having-t us my invention, 'what 1. In ore roasting apparatus of the;class described, the combination with a roastingpot, of a'hood inclosingthe upper portion of the pot, the lower" edge of the hood being sealed to form an air-tight chamber in which the pot is located.

. 2. The combination with a chamber and a roasting-pot mounted therein, of a hood covering and surrounding the upper portion of the pot, the lower edge of the hood being provided with an air-tight seal, for-the purpose set forth.

'3. In apparatus of the class described, the combinatlon with a chamber and a roastingp'ot'mounted therein, of a hood inclosing the upper part of the pot, the lower ed of the hood being supported by the wa of the. chamber, and means [for forming an air ti ht seal around the lower edge of the hood, sifiistantially as described.

4. The combination with a roasting-pot and a wall surrounding the potand forming a chamber in which the potis supported, of a hood 'su ported by the wall andmeans applied to tiie wall for sealing the lower edge of the hood against the entrance of air, for the purppseset forth.

5. .The'combination with a roasting-pot, of a hood for the pot, the hood being mounted to rotate, and its lower ed e being provided with an air tight seal, su stantially as described.

6. The combination with a' roasting-pot and a chamber .i-n'which the pot is mounted,

of a hood supported by the wall of the 3.0

chamber, and mounted to travel annularly thereon. 1 7, The combination with a roasting pot,

I a hood for the pot, a support for the hood upon which the latter is mounted to'rotate, the lower edge of the hood being provided with an air tight seal, substantially as described.

8. The combination with a roasting-pot, of a hood inclosing the up er portion of the pot, a support for the hoo a track mounted on said support,- and wheels applied to the *hood and engaging said track, toallow the hood to rotate, for the pur ose set forth.

9, In apparatus of the c ass described,v the combination of a roasting pot, and a cham-. ber in which the pot is supported, of a hood 4 fdescribed. I

.1110. The combination w1th a roasting-pot,

provided with exteriorly located Wheels, a track' engaged by said wheels and forming a supportfor the hood, and means for sealing the lower edge" of the hood, substantially as of a hood having a rabble opening, a movable closure for said opening, the hood being rotatably mounted to permit access to any portion of the contents of the pot through the said opening, substantially as described.

11. The combination with a roasting-pot,

of a hood'for the pot, means for sealing the lower edge of the hood to form an air tight chamber in which the plot is: located, means for introducing a blast of'air to the pot, and

.a fume escape flue in communication with the chamber, substantially as described.

12. In apparatus of the class described, the combination with a roasting-pot, of a hood therefor, a support for the lower edge of the hood, means for forming a seal around said edge, the hood being mounted to rotate and having an opening in its upper portion and a door movably mounted on the hood and forming an air tight closure .for the opening, substantially as described.

13. The combination with a roasting-pot,

of a hood therefor, the hood having an open-- ing in its upper portion, a door mounted to swing upon the hood and adapted to form an air tight closure for the said opening, a roller connected with the door and avtrack mounted upon the hood and engaged by the roller-during the opening and closing movement of the door, the track being con-- structed to cause the door to gradually rise during the opening operation, substantially 

